Lollipop charts in Matplotlib - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a basic lollipop chart with matplotlib.

Matplotlib

import matplotlib.pyplot as plt

x = [1, 2, 3, 4, 5]
y = [10, 15, 7, 12, 9]

plt.stem(x, y, linefmt='grey', markerfmt='o', basefmt=' ')
plt.xlabel('X axis')
plt.ylabel('Y axis')
plt.title('Basic Lollipop Chart')
plt.[1]()

Drag options to blanks, or click blank then click option'

Abar

Bplot

Cscatter

Dshow

Attempts:

3 left

💡 Hint

Common Mistakes

Using plt.plot() instead of plt.show() to display the plot.

Forgetting to call any function to display the chart.

The plt.show() function displays the plot window with the lollipop chart.

2fill in blank

medium

Complete the code to set the color of the markers in the lollipop chart to red.

Matplotlib

import matplotlib.pyplot as plt

x = [1, 2, 3, 4, 5]
y = [10, 15, 7, 12, 9]

plt.stem(x, y, linefmt='grey', markerfmt='[1]', basefmt=' ')
plt.show()

Drag options to blanks, or click blank then click option'

A'ro'

B'ko'

C'go'

D'bo'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'bo' which sets blue markers instead of red.

Forgetting to include the marker style 'o' in the string.

The markerfmt='ro' sets the marker color to red with circle markers.

3fill in blank

hard

Fix the error in the code to correctly plot a lollipop chart with custom line and marker colors.

Matplotlib

import matplotlib.pyplot as plt

x = [1, 2, 3, 4, 5]
y = [10, 15, 7, 12, 9]

plt.stem(x, y, linefmt=[1], markerfmt='ro', basefmt=' ')
plt.show()

Drag options to blanks, or click blank then click option'

A'grey--'

B'grey-'

C'grey'

D'grey:'

Attempts:

3 left

💡 Hint

Common Mistakes

Using only 'grey' without a line style causes an error.

Using dashed or dotted line styles when a solid line is expected.

The linefmt parameter requires a format string including color and line style, e.g., 'grey-'.

4fill in blank

hard

Fill both blanks to create a lollipop chart with green stems and blue circle markers.

Matplotlib

import matplotlib.pyplot as plt

x = [1, 2, 3, 4, 5]
y = [10, 15, 7, 12, 9]

plt.stem(x, y, linefmt=[1], markerfmt=[2], basefmt=' ')
plt.show()

Drag options to blanks, or click blank then click option'

A'g-'

B'ro'

C'bo'

D'k-'

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up colors or line styles in the format strings.

Using 'ro' for markers when blue markers are requested.

linefmt='g-' sets green solid lines; markerfmt='bo' sets blue circle markers.

5fill in blank

hard

Fill all three blanks to create a lollipop chart with x labels, y values, and a title.

Matplotlib

import matplotlib.pyplot as plt

x = [1, 2, 3, 4, 5]
y = [10, 15, 7, 12, 9]

plt.stem([1], [2], linefmt='grey-', markerfmt='ro', basefmt=' ')
plt.[3]('Lollipop Chart Example')
plt.show()

Drag options to blanks, or click blank then click option'

Ax

By

Ctitle

Dxlabel

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping x and y data in the stem function.

Using plt.xlabel() instead of plt.title() for the chart title.

The stem plot uses x and y data; plt.title() sets the chart title.